Ventilator



May 30', 1933. F. A. sTRAwsm VENTILATOR Filed May 5, 1950 INVENTOR .1 67)? Sz/rflws 2776 ATTORNEYS Patented May 30, 1933 UNITED stars Lassa TENT FfifiE FERN A. S TRAWSINE, F OOR'UNNA, MICHIGAN VENTILATOR Application filed. May 5, 1930. Serial No. 450,044.

' different sized openings and-may be easily and quickly applied or removed and to so construct the ventilator that it may be held in closedposition, if desired. Further objects are to provide common means for mount- 5 ing the vanes of the ventilator and closing the space between the ends of the vanes and the frame of the ventilator and to provide means for silencing the operation of the vanes.

\Vith these as well as other objects in view,

0 the invention resides in the novel features of construction and combinations and arrangements of parts as more fully hereinafter set forth.

In the drawing Figure 1 is a perspective view of a ventilat-or embodying my invention;

Figure 2 is a perspective view of a portion thereof;

Figure 3 is a vertical section therethrough;

Figure 4 is a horizontal section through a portion thereof;

Figure 5 is a front elevation, partly in section, of a portion thereof; 3 Figure 6 is a perspective view of a portion 5 thereof.

In general, the ventilator embodying my invention may be used in various types of buildings, such as residences, public institutions, industrial institutions and poultry and 0 stock buildings, etc. a

The frame of the ventilator comprises the main frame 1 and the auxiliary frame 2, which in the present instance are formed separately and are secured to each other, al-

though it is apparent that if desired the two may be integral. The main frame 1 has the upper and lower rails 3 and 4, respectively, and the upright rails 5. The auxiliary frame also consists of upper and lower and upright rails, which together form an opening registering with the opening formed bythe upper V and lower and upright rails of the main frame. The auxillary frame has secured to the outer edge portions of its upright ralls the slides 6, which are preferably formed of sheet metal and are channel-shaped to embrace the upright rails at their outer edges. These slides have at" each'end the transverse flange 7 which is formed with the inturned tongue 8 at itsinner' end slidably engaging the groove 9 formed in the corresponding upper or lower edge of the upright rail. To prevent accidental disengagement of the slide from the upright rail, there are the stops 10 which are in the nature of pins and which extend transversely through the upright rail and across the outer portions of the slots to engage the inturned tongues. 11 are coil springs extending transversely of the upright railsand the slides and extending within the bores 13 in the outer edges of the upright rails and abutting the bottoms' of these bores and the bases of the slides. This construction provides for locating the ventilator in various sized openings and at the same time snugly holds the ventilator in place.

14 are the double bladed ventilator vanes which extend horizontally between the upright rails of the frame. These vanes are V-shaped' and have their apices uppermost and they are so arranged that either of their blades overlap the corresponding blades of the next lower vanes. In theirnormal or open position, the blades of the vanes are spaced to provide air passageways there-' between. The blades of the vanes are preferably at acute angles to each other and extending between andsecured to these blades at the apices of the vanes are the reinforcing webs 14;; I have found that an angle of w approximately fifty degrees between the blades of the vanes is most practical for general purposes and that this angle may vary from approximately thirty-five degrees to seventy degrees depending upon the purposes and the desired sensitiveness of operation.

15 are mountings for the vanes. These mountings are angle bars at the opposite ends of the vanes, each bar having a flange semo cured to the adjacent upright rail 5 and having a transverse flange extending inwardly into the opening formed by the frame. The transverse flanges are formed with the horizontal notches 16 at their free edges and the end portions of the apices of the vanes are formed with the notches 17. The notches 16 are of a size to receive the portions of the apices of the vanes adjacent the notches in these vanes and the notches 17 are of a size to receive the portions of the transverse flanges outwardly beyond the notches of these flanges. Furthermore, both the notches 16 and 17 are of a size to permit the vanes to swing. lVith this arrangement the vanes are pivotally mounted upon the bars and the bars form weatherseals between the ends of the vanes and the upright rails when the vanes are in closed position, so that air cannot pass through the ventilator. Furthermore, the vanes are held from becoming accidentally disengaged from the bars.

The upper rail 3 is preferably provided with the notch 18 in itslower face for receiving the apex'of the uppermost vane so that air cannot pass directly through the ventilator between the uppermost vane and the upper rail. I also provide the sheetmetal sill 19, which is secured to theouter edge of the rail 4 of the frame and extends'inwardly over this rail and terminates in the upwardly extending flange 20, the ends of which overlap the transverse flanges of the bars 15. This terminal flange is engageable by either of the blades of the lowermost vane when the latter is swung to closed position, so that with this arrangement a weatherseal is provided at the lower portion of the ventilator opening and at the same time moisture is prevented from passing over the lower rail of the frame.

To compel the vanes to operate in unison, there is the vertically extending tie rod 21, which is pr-eferablylocated at the inner side of the ventilator and which is pivotally connected to each vane by suitable means, which, as shown, comprises the clips 22 secured to the lower edges of the inner blades of the vanes and the pivots 23 connecting each of these clips to the bar 21. 24 is a coil spring attached to the lower end of the tie rod 21 and to the lower rail of the auxiliary frame 2. The attachment is secured by forming the spring with the lower straight portion 25having the bent end or eye 26 and having this straight portion pass through an opening in the bracket 27, which is secured to the lower rail of the auxiliary frame. The construction is such that no tension is placed upon the spring until the outer blades of the vanes are nearly closed or, in other words, the construction is such that the spring is placed under tension only during the final operation of the closing movement of the outer blades of the vanes, so that this spring retards this struction and break up the air currents.

closing movement and assists in preventing noise.

For the purpose of making the ventilator quiet in operation, the outer blades of the vanes have secured to their lower edges the horizontally extending strips of sound deadening material 28, such as felt, which are engageable with the next lowermost outer blades when in closed position and which, in addition to making the ventilator quiet in operation, form Weatherseals between these outer blades. These strips are preferably secured to the outer blades by forming these outer blades. with return-bent lower edges embracing portions ofthe strips and these return-bent lower edges further serve in reinforcing the vanes. Blocks 29 of sound deadening material are also preferably secured to the lower surfaces ofthe inner blades of the vanes for contacting with the next lowermost inner blades'to deaden sound, in the event that these inner blades'move, to closed position. I

To holc the vanes closed when desired, the 100k 30 is provided upon the inner sideof upper rail of the auxiliary frame 2 and 251 is provided upon the upper end 0 i 21 for receiving the hook when the outer biases of the various vanes are in closed position.

in operation, it will be seen that the vanes remain open in case of little or no Winds. In case of moderate wind conditions, the vanes act as baiiles because of their V-shaped con- As the velocity of the wind or the air pressure becomes higher, the vanes will close proportionately and with gusts of high winds the vanes close temporarily. It will be seen that for all practical purposes the amount of air allowed to pass through the ventilator is substantially constant through the range of wind conditions.

' What I. claim as my invention is:

1. In a ventilator, t-he combination with a frame forming an opening, of a V-shaped vane within the opening having its apex notched at both ends, and bars at opposite sides of the opening and secured to said frame extending within the notches ofrsaid vane and notched to receive theapex portions of said vane adjacentthe notches said connections having lost motiomthe play in said lost motion connection being taken up during the closing movement of said vanes and prior to contact thereof, whereby said yieldable means is placed under tension to retard the final closing movement of said vanes.

8. In a ventilator, the combination with a frame forming an opening, of a vane within the opening having a V-shaped portion, and bars at opposite sides of the opening and secured to said frame, said bars being formed with notches through which said vane extends and for pivotal engagement with the apex of said V-shaped portion.

4. In a ventilator, the combination with a frame forming an opening, of a vane within the opening having a V-shaped portion with its apex notched at both ends, and bars at opposite sides of the opening and secured to said frame, said bars extending within the notches of said vane and being notched to receive the apex portions of said vane adjacent the notches therein.

5. In a ventilator, the combination with a frame forming an opening, of vanes within the opening and pivotally mounted upon said frame and arranged to normally provide air passageways therebetween and to overlap each other upon swinging to closed position, each of said vanes having a return-bent reinforcing edge portion and a strip of sound deadening material secured in each of said return-bent edge portions and extending therefrom to contact with the adjacent vane upon swinging of said vanes to closed position.

6. In a ventilator, the combinationflwith a frame forming an opening, of vanes within the opening and pivotally mounted upon said frame, said vanes being provided with means automatically operable upon being subjected to an air current for tending to close said vanes, means connected to said vanes for compelling the same to move in unison, and yieldable means having a lost motion connection with said first mentioned means and said frame for yieldably resisting final closing only of said vanes.

In testimony whereof I aifix my signature FER-N A. STRAVVSINE. 

